One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(17,18,21,27,22,26,29,24)(19,23,30,25,28,32,20,31)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,22,28)(18,23,26,32)(20,21,30,29)(24,31,27,25)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(18,24)(19,28)(21,29)(23,25)(26,27)(31,32)(9,11)(10,14)(12,15)(13,16)(17,20,22,30)(18,25,26,31)(19,29,28,21)(23,27,32,24)(11,15)(14,16)(18,26)(19,28)(20,30)(24,27) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.